I suspect most people outside of the most privileged circles know at least a couple opiate addicts who have ruined their own lives and harmed others around them.

the important question to ask is how much of this is inherent to the drug itself and how much is a consequence of prohibition. my take is that most of the horrible things that heroin addicts do is a result of the financial/legal situation that prohibition puts them in, not the inherent effects of the drug. in my experience, opiate addicts with a secure supply tend to be docile, if unproductive, members of society. I wouldn't say the same for alcoholics...